Question

calculate the number of mole in 12g of HNO3​

Answer 1

Correct question:-

Calculate the number of moles in 12g of HNO3

Given:-

•Given mass of HNO3(Nitric acid)=12g

To find:-

•Number of moles present in 12g HNO3

Solution:-

The elements present in Nitric acid(HNO3) are Hydrogen,Nitrogen and Oxygen.

•Atomic mass of Nitrogen(N)=14u

•Atomic mass of Hydrogen(H)=1u

•Atomic mass of Oxygen(O)=16u

Thus,molecular mass of HNO3:-

=>1+14+16×3

=>15+48

=>63u

Since,molecular mass of HNO3 is 63u,thus it's molar mass is 63g.

Now,we know that ,number of moles:-

=>Given mass/Molar mass

=>12/63

=>0.19 moles (approximately)

Thus,0.19 moles are present in 12g HNO3.